I bring my inputs from another post. I hope this help too.
First of all, let’s take a look what’s good about Vengeance Demon Hunter right now that all of us would appreciate and enjoyed being one:
1)15 yrd interrupting spell - Disrupt
2)10 yrd purge - Consume Magic
3)Glide (weeee) - Being able to counter knock back with certain dungeon mechanic like Shrine of Storm first boss Surging Rush or would other wise fall to death
4)Demonic Ward - A passive of flat 10% damage reduction that all tank would appreciate
5)High dps output - Though not many VDH know that dps = survival. But yes I would agree in high level M+ dungeon our dps does not matter much.
6)Our colorful Unreal Engine logo - Sigils of Chains, Silence, Misery are powerful tools if use “correctly”.
7)Please feel free to quote my post and add on if you have one
Second of all, let’s us all agree that the issues we’ve encounter during our course of tanking:
1)Super spiky damage intake - Being able to reduce our health from 100% to 20% in less than 2 second often than not made us hit our oh #^%( button and drive our dear healer into panic too. The most common things that was right after we consumed 5 soul shard for the amazing spirit bomb dps and the big damage comes in, we gotta fracture twice again and be able to heal up but the 5 seconds window of big self healing had passed (Refer to Soul Fragments description). But really, I know you folks feel uneasy seeing 5 pretty soul shards floating around while waiting for big damage comes in xD It takes a lot of discipline to be able to resist hitting Spirit Bomb button.
2)Self healing are not as effective as they used to be - I didn’t play VDH during Legion but I read a lot of post about VDH comparison of Legion & BFA, VDH gets tons of nerfs and is now the least favorite tank among players.
3)Healers/Leaders refused to heal VDH and you were uninvited from party - It is not wrong to follow current meta (all hail Drunk Monk and Blood Knight) and we don’t pay your sub and you should enjoy the game “your way”. But you guys must know that we VDHs hurt like hell when being rejected without trying.
4)Lack of CDs like what OP and few others above me had mentioned - Demon spike sure is awesome, but warrior has shield blocks, ignore pain, last stand, and a freaking shield wall.
5)Those under-performed talents, allow me to list some of it
5.1 - Lv 100 Feast of souls, seriously, you call this self healing or?
5.2 - Lv 104 Soul Rending < 5% of smh leech, I would rather this to become the effect of Mastery Fel Blood at least prove more useful.
5.3 - Lv 108 Gluttony, I’ve heard that this used to be a baseline of VDH but now it’s align with our most useful skill of all - Spirit Bomb.
5.4 - Lv 110 Void Reaver - 6% of DR seems pretty nice but seems pretty powerless in front of current high level M+ dungeon.
Here comes what I’m most excited to share, how should we balance and improve VDH without being too OP and at least get some loves from people.
1)Fracture, Spirit Bomb, Soul Barrier to be our baseline.
2)Vengeance Brand - (Replace Chaos Brand passive) Your damage brands the target. Granting 5% of leech. Havoc spec remained the same of 5% magic damage increased so at least make VDH more viable.
3)Demon Spikes - Surge with fel power, reduce all damage for 25%(Affect by Mastery). Last for 5 sec. Max 2 charges. CD 15 sec. Able to shorten with haste.
Lv 99 - all unchanged
Lv 100 - left slot Feasts of soul - Soul Cleave heals you for 10% of all damage taken in the last 10 sec over duration of 10 sec. Stacking this effect does not extend it’s duration.
Lv 102 - mid slot Charred flesh - Your Vengeance Brand also increasing 10% fire damage taken from you
Lv 104 - left slot - Fel Eruption - yay stun, cost 30pain (Replacing Soul Rending talent), right slot - Darkness - maybe give 20% dodge are good for us?(Replacing Fracture talent)
Lv 106 - all unchanged
Lv 108 - left slot replacing Gluttony - Blazing Soul, passive - Convert Soul Cleave into Fire Damage. Using Soul Cleave will now consume all lesser soul fragments available, adding 5% of increased fire damage for each soul consumed.
Mid slot Immolation Burst, New Lv 108 talent (Replacing Spirit Bomb talent) - Replaces Immolation Aura. Unleashed burst of fel power within you, causing x fire damage to enemies within 8 yards. You regain 75% of damage dealt to yourself in over 5 sec. Cost 10% health, Generates 20 Pains.
Lv 110 - mid slot Empowered Ward, passive - your tattoo now reduced all damage taken by 20%, and decrease your pain cap to 90
right slot - Soul Reaper - Spawned Lesser Soul Fragments now float and follow demon hunter around for 15 secs. Each granting 3% of damage reduction. Max 5 souls. Big soul fragments completely removed. Personally I think this is not OP and all of us would love.
Generally, the changes above would make talent selection a much challenging and more interesting combination available. Also make VDH a literally soul hunting hunters that require proper pain and soul management in order to play well.
I know, bliz don’t care about community and above are just my dream. I would still remain as VDH until it’s eventual buff xD
P/S: Pardon my English and grammar, I am from SEA and do not have fancy education back then.